Multiple-ply-paper-board-making machine.



R. M. SCANLAN.

MULTIPLE PLY PAPER BOARD MAKING MACHINE.

APPLICATION FILED NOV. 7, 1910.

1 ,O 1 8,588. Patented Feb. 27 1912.

WJTAZESSEE' JAZVENTUR.

ir cmia/n,

R. M. SOANLAN'. MULTIPLE PLY PAPER BOARD MAKING MACHINE.

APPLICATION FILED N0 7, 191 1,018,588.

Patented Feb .27. 1912.

I! III A HI-T Win 555E WVENTUR R. M. SCANLAN. MULTIPLE I'LY PAPER BOARD MAKING MACHINE.

APPLICATION FILED NOV. 7. 1910.

Patented Feb. 27, 1912 I! SHEETS-SHEET 3.

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STATES PATENT OFFICE.

ROBERT M. SCANLAN, OF TOLEDO, OHIO, ASSIGNOR 0F ONE-HALF TO JOHN B. SHEPLER,

0F TOLEDO, OHIO.

Application flled November 7, 1910.

Specification of Letters Patent.

Patented Feb. 27, 1912.

Serial No. 591,063.

To all whom it may concern:

Be it known that I, ROBERT M. SCANLAN, a citizen of the United States, and a resident of Toledo, in the county of Lucas and.

State of Ohio, have invented a certain new and useful Multiple-Ply-Paper-Board-Making Machine; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to machinery of the type employed for the making of multipleply paper, card-board, binders board or the ike.

The machines heretofore used for such purpose, so far as I am aware, have employed cylinders upon which a sheet or web of pulp is wound until the paper or board being made is of the desired thickness. When such operation has been performed the paper or board thus made is removed from the cylinder and is then longitudinally severed and rolled out into flat sheet form. As the diameter of the successive plies naturally increase as one winds upon the other it is apparent that when the board is flattened the greater length of the outer plies will cause wrinkles to occur in the outer side of the board, which Wrinkles in the rolling oporation are fiattcned and pressed into the board. It is impossible, however, to entirely remove the roughness occasioned by such wrinkles, thus necessarily leaving the outer side of the board with a rough surface which renders it impractical for certain uses.

The object of my invention is to overcome the objections to the making of multiple-ply board in cylinder form and then flattening the same, by the provision of a machine which will make a flat board of as many plies as desired and so operate on the board that it is delivered from the machine incontinuous sheet form and in condition to be cut into sheets of the desired size.

A further object of my invention is the provision of a simple and efficient machine of this class which will enable the outer ply of a board tov be made of the same or of different color and of colors which are different from the inner or body ply thereof, thus enhancing the practicability and commercial value of machines of this class and making the manufacture of multipleply board both simple and economical.

The invention is fully described in the following specification and while in its broader aspect, it is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings, in which,-

Figure 1 is a side elevation of a machine embodying my invention with a greater part thereof in vertical longitudinal section. Fig. 2 is an enlarged section of one of the ply aliixing units of the machine with the associated part; of the machine. Fig. 3 is an end view thereof with a portion of the pulp carrying screen broken away. Figs. 4 and 5 are enlarged details of the drive mechanism of the machine. Fig. 6 is an enlarged top plan of one of the ply ailixing units of the machine with a portion of the screen broken away, and Figs-7 and 8 are enlarged sectional details of a portion of the pressing and water-extracting rolls of the machine.

Referring to the drawings, 1, 1, designate the frame sides of a machine embodying my invention, between which sides are mounted upper and lower sets of pressing and waterextracting rolls .2, and intermediate sets of preferably smaller pressing and water-extracting rolls 3. At least one of the rolls of each of these sets is mounted for adjustment toward and away from its companion, which adjustment is controlled in each case by an adjusting screw 4. Each set of rolls 3 is shown in the present instance as comprising one perforated or water-extracting roll while the other roll has a solid or impcrforate periphery to adapt it to press the intermediate material to the perforated-roll to squeeze the Water therefrom through the perforated roll. The perforated and solid rolls of the sets 3 are preferably arranged in alternate order as shown. The rolls 2 and the perforated ones of the sets 3 are of substantially the same construction and are for the same purpose as the water extracting rolls described and claimed in my United States Letters Patent No. 741,980, dated October 520, 1903, and will therefore not be describcd in detail. The liquid is carried off from the rolls by troughs 5 disposed therein and delivered to a drainage pipe 6 at one side of the machine.

Two belts or endless aprons 7, of felt or other suitable material pass between the sets of pressing and water extracting rolls 2 and 3 and pass in opposite directions therefrom aroundsuitably arranged idler and take-up rolls 8, and have portions 7 thereof guided adjacent the top of the machine for substan-' tially horizontal. movements toward the upper set of rolls 2 by a part of the idler rolls 8 as shown. The aprons 'T'after leaving the lower set of rolls 2 areshown in the present instance passing between a final set of compressing rolls 9, which set of rolls also serves as the drive-rolls for the aprons. For this purpose the rolls are geared together by gears 10, see Figs. 4 and 5, and on the shaft of one roll is mounted a pulley 11, which is shown as being driven by a belt 12, which in-turn is driven by a motor 13, or in any other suitable manner.

Arranged above the horizontal portion 7 of each apron 7 and supported by the frame sides 1, or in any other suitable manner, are a plurality of tanks 14 comprisingparts of separate ply afiixing units of the machine. Each tank 14 has an endless screen or perforated belt 15 associated therewith, suchscreen being guided for movement around the tank and down into the same byidler rolls 16, one at least of which is mounted for adjustment in its bearings to take up slack in the screen, and is shown as having an adjusting screw 17 for such purpose.

The screen 15 travels in the direction indi cated by the arrow or atits lower side in the same direction as the horizontal portion 7 of the associated apron 7 and is guided to enter the tank at one side thereof and thence to travelupwardly on an incline over the opposite side of the tank as shown. The in clined portion of the apron 15 passes over a correspondingly inclined table or platform 18 in substantial contact therewith, and this table or platform is provided with sets of perforations 19 and 20, which extend transversely thereof. throughout its width. The set of perforations 19 open into a chamber or box 21 within the tank 14 and 'provide the only means of exit for liquid from the tank, such liquid flowing from thechamber 21 through one or more pipes 22 .in its bottom. .The pipes 22 lead into a manifold 23,

which has connection through-a pipe 24 with a pipe 25, which has its dischargeinto the associated tank 14 abovexthe table 18 at apoint to the rear of the set of perforations 19. A forced circulation is created through.

the tank 14, chamber 21 and pipe 24 in the present'instance by a centrifugal pump 26, which is interposed in the pipe 24. In order v thatthe circulation of liquid througl'i the ta1ik'14 and its chamber 21 may be distributed throughout the length of such chamber,

min le within the common dischar e i e 25 and are discharged together into a distributing trough 25 from which they flow o er the side thereof upon the screen 15 into the tank. As the screen in its travel passes over .the set of perforations 19 in the table the suction created by the forced circulation of liquid through the tank 14, chamber 21 and pipe 24 draws the water from the screen and leaves a layer. of pulp. evenly distributed over. the screen surface. a

If binder or other boardhaving its faces or outer sides of a different color from the interior thereof is manufactured, each end tank should have its own individual circulating pipe 24 as such liquid is colored and would effect a coloring of the liquid in the intermediate tanks if it were permitted to commingle therewith. For this reason the endtanks '14 of the machine are shown as having individual water circulating pipes, while the water circulation of the intermediate tanks is through a common pump 26'.

vth'eset of perforations 19, asindicatedby dotted line in Fig. 2, thus placing the sec ond.set. of perforations 20 above the water line. The perforations 20 open into a subtion chamber 29 which has communication through a pipe 3Q'With a vacuum pump 31, which is shown asbeing driven in the present instance by a motor 82.

20 of all the vats associated with the machlne are shown as communicating. As a' screen 15 and adhering pulp passes over the I The pipe 30 i. forms a manifold'with which the chambers set of perforations 20, the air suction created tends to draw from thes creen a large porso asto very materially reduce the moisture carried by the pulp and screen after passing.

through such perforations and chamber'29 tion of the remaining liquid carried thereby from the tank. Aseach sereen "15' passes under its tank it s .o'uter pulp carrying side J is pressediagainst the s'ubjacent portion 7" of the apron'T-by one of the guide rolls 16, which rollis'designa'ted 16', thus causing the pulp to release its hold upon the screen and to adhere to the surface of the apron 7, or, if it-be an intermediate ply'of the board, to adhere to'theply or layer of pulp which was placed upon the'apron by'the preceding.

screenofthe' machine. A roll 33 acts upon the under- 's'ide of the apron 7..beneath the roll lfijtdeooperate with such roll to'hold the apron ari'djscreen .15 in contact at the.

point of transfer of the pulp layer from one to the other thereof as above described. The roll is held in ielding contact with the apron 7 due to its eing hung at the ends of lever arms 34 which are pivoted to associated parts of the frame sides 1 and connected at the ends thereof which are opposed to the roll 33 to weighted arms 35 by links 36. The weighted arms 35 are in turn shown as being pivoted to fulcrum links 37 as indicated in Fig. 2. The rolls 33 are preferably perforated to form liquid extracting rolls so that the liquid which would otherwise back up between the apron 7 and screen 15 to the rear of the rolls 16 and 33 will be drained off to a lar e extent through the rolls 33. This action is also facilitated by slightly inclining the portions 7 of the aprons 7 from their inner ends outwardly as indicated. thus causing the liquid which is pressed from the pulp carried by the screen 15 to flow to ward the rolls 16' and. 33 instead of rearwardly therefrom.

It will, of course, be understood that as many tanks 14 and their associated pulp applying parts may be employed as the thickness or number of plies of the board being manufactured may require, and that the horizontally disposed portions 7 of the aprons 7 may be of suitable length to accommodate the number of tanks used.

In the operation of my invention the running of the motor 13 drives the set of rolls 9, which in turn act upon and drive the aprons 7, 7 in the directions indicated by the arrows. While the pulp applying screens 15 may be run in any suitable man ner as desired they are shown in the present instance 'as being driven by reason of their frictional contact with the aprons 7. The pulp being free to flow from the vats 23 to the respective tanks 14. and the different mechanisms of the machine being in opera tion, the pulp and water flow together into the discharge pipe 25 where they commingle and are discharged into the distributing trough 25 which is disposed across the top of the inclined table 18 within the associated tank 14 and to the rear of the set of perforations 19 in such table. The pulp and Water which flow from the trough 25 are deposited upon the portion of the associated screen 15, working over the table 14. As the screen passes over the set of perforations 19, the water circulation through such perforations causes an evening of the pulp layer upon the screen and draws a partof the water therefrom. As the screen emerges from the liquid in the tank let and passes over the set of perforations 20 the air suction through such perforations draws a large portion of the Water which adheres to the pulp and screen therefrom, and the pulp layer is then carried by the screen to the point Where it has contact with the subjecent apron 7 between the rolls 16 and 33. The pressing of the screen 15 and apron 7 together by the rolls l6 and 33 causes the pulp layer carried by the screen to be transferred therefrom to the apron. As the layers of pulp thus deposited upon the aprons 7 by the outer end screens l5 of the machine are carried toward the set of pressing rolls 2, they pass under the screens 15 of the other pulp applying units in the order of their arrangement. The layers of pulp carried by such screens are successively applied thereto one on top of another and as the aprons pass down between the sets of pres-- sure and water-extracting rolls 2 and 3 the multiple-ply pulp or board carried by the two aprons are pressed together to forma single sheet of binders board or the like. The passing of the pulp sheet between the. rolls 2 and 3 in addition to closely pressing .the layers of the board together, extracts the water therefrom so that the sheet when dolivered from the final set of rolls contains a minimum of moisture. After passing be tween the drive rolls 9, the pulp sheet is fed to a cutting mechanism, not shown. by which it is severed into sheets of the csired size.

The machine shown is provided with four pulp applying units, two in association with each apron 7. thus adapting the machine for the manufactau'e of a four'ply board. It is understood, however. that the invention is not restricted to any particular number of pulp applying units as the number of the same depends upon the thickness of the board being manufactured. Should it be desired to manufacture a board having its outer sides either of the same or of dill erent colors, but different in color from the inner plies or layers, the pulp in the end .vats 28 may be of the desired color or colors and the pulp in the intermediate "ats 23 be in its natural state or colored to suit the (h sired shade of the intermediate layers of the board. The thickness and proportional distribution of the pulp layer upon a screen 1:) is regulated by the water circulation through the associated pipe 94, as the rcgw lation of the valves in the pipes leading to the manifold 523 will effect a change in the thickness of the pulp layer on the screen 15.

The applying of the pulp layers to the upper sides of the aprons 7, 7 instead of to the under side thereof as has been the case with paper making machines heretofore used, so far as I am aware, is a very import-ant feature of my nvention. lVith the types of machines for. ierly used. or those in which the pulp layers are applied to the under side of an apron, the weight of such layers causes them to frequently drop from the apron, thus necessitating a stopping of the machine to replace the pulp layers in adherence to the under side of the apron.

With applicants construction it is impossible for the pulp layers to drop from ongagement with the aprons as such layers lie 'an important feature.

I wish it understood that my invention is not limited to any specific construction or arrangement of the parts except in so far as suchlimitations are specified in the claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is, r

1. In a machine of the class described, the combination of two endless aprons havmg horizontally moving portions and contiguous vertically moving portions, means guiding the movements of said aprons and serving to press the contiguous vertical portions thereof'together, and means for applying pulp in layer form upon the tops of the horizontal portions oft-he aprons in position for such layers to pass-with the aprons betweenthe pressing portions of said guide means whereby siich layers are united in asingle multiple ply sheet.

2. In a machine of the class described, the combination with amovable apron, of a tank having a liquid chamber, a liquid circulating chamber and a vacuum chamber, the circulating and vacuum chambers each having a top provided with perforations opening into each of said chambers, an endless perforate belt guided for movementaround said tank with a part in contact with said a ion and a part extending down into the tan: and passing over said top substantially in contact therewith throughout its length, means for discharging a liquid pulpupon the portion of said belt passing over said top, means for creating a circulation of liquid through the belt, one set of said perforations and the circulating chamher, and means for creating a vacuum within the other of said chambers to create a suction through the perforations leading thereto.

3. .In a machine of'the class described, the combination with a movable apron, of a tank having a water circulating chamber and an air circulating chamber therein, the tops of said chambers being inclined and standing in a common plane and each having perforations to the respective chambers, an endless perforate belt guided for movement around the tank with its outer side in contact with said belt at a point in its movement and with a portion guided for move ment down into the tank and over the tops of said chambers in close proximity thereto, means for discharging matter into the tank over said belt below the said perforations, means for causing a-circulation of water through the water circulating chamber and the perforations in its top, and means for creating a circulation of air through said air chamber and the perforations in its top to act to extract liquid from the belt as it passes thereover.

' 4. In a machine of the class described, the combination of a pair of oppositely movable endless aprons, a plurality of sets of pressure and liquid extracting rolls acting on the aprons to press portions of the same together and extract liquid therefrom, idler means for guiding the actions of said aprons, means for driving the aprons, and

' at least one pulp. applying unit associated with each apron for applying pulp in layer form thereto in position to pass with the aprons between said-pressure and liquid extracting means, said units each comprising a tank, an endless pulp applying member movable around said tank and into the same and in contact with the associated apron, antlmeans for discharging liquid pulp within the tank and upon said member.

In testimony whereof, I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

ROBERTA/I. SCANLAN. VVitnesses: C. W. OWEN,

M. G. GAsKELL. 

